26390140139 has 8 divisors (see below), whose sum is σ = 28792389168. Its totient is φ = 23988415360.

The previous prime is 26390140129. The next prime is 26390140171. The reversal of 26390140139 is 93104109362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26390140139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26390140129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21842 + ... + 230775.

It is an arithmetic number, because the mean of its divisors is an integer number (3599048646).

Almost surely, 2^26390140139 is an apocalyptic number.

26390140139 is a deficient number, since it is larger than the sum of its proper divisors (2402249029).

26390140139 is a wasteful number, since it uses less digits than its factorization.

26390140139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262125.

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 26390140139 in words is "twenty-six billion, three hundred ninety million, one hundred forty thousand, one hundred thirty-nine".